./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:35:12,146 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:35:12,210 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:35:12,216 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:35:12,216 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:35:12,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:35:12,248 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:35:12,248 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:35:12,249 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:35:12,252 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:35:12,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:35:12,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:35:12,253 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:35:12,254 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:35:12,254 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:35:12,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:35:12,255 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:35:12,255 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:35:12,255 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:35:12,256 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:35:12,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:35:12,256 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:35:12,256 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:35:12,257 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:35:12,257 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:35:12,257 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:35:12,257 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:35:12,257 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:35:12,258 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:35:12,258 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:35:12,259 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:35:12,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:35:12,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:35:12,259 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:35:12,260 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:35:12,260 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:35:12,260 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:35:12,260 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:35:12,260 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:35:12,261 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:35:12,261 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:35:12,261 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:35:12,261 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:35:12,261 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2024-01-27 15:35:12,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:35:12,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:35:12,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:35:12,505 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:35:12,506 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:35:12,507 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-01-27 15:35:13,565 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:35:13,725 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:35:13,725 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-01-27 15:35:13,731 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9700ca617/3eb2264db4a548b2bf7911c721ae2bc7/FLAG490f7b911 [2024-01-27 15:35:13,741 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9700ca617/3eb2264db4a548b2bf7911c721ae2bc7 [2024-01-27 15:35:13,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:35:13,744 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:35:13,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:35:13,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:35:13,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:35:13,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:13,750 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ca33142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13, skipping insertion in model container [2024-01-27 15:35:13,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:13,767 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:35:13,882 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-01-27 15:35:13,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:35:13,905 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:35:13,920 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-01-27 15:35:13,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:35:13,931 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:35:13,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13 WrapperNode [2024-01-27 15:35:13,932 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:35:13,933 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:35:13,933 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:35:13,933 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:35:13,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:13,943 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:13,956 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2024-01-27 15:35:13,962 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:35:13,962 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:35:13,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:35:13,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:35:13,971 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:13,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:13,972 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:14,003 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:35:14,004 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:14,004 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:14,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:14,022 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:14,023 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:14,024 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:14,025 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:35:14,026 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:35:14,026 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:35:14,026 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:35:14,026 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (1/1) ... [2024-01-27 15:35:14,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:35:14,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:14,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:35:14,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:35:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:35:14,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:35:14,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:35:14,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:35:14,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:35:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:35:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:35:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:35:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:35:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:35:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:35:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:35:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:35:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:35:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:35:14,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:35:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:35:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:35:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:35:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:35:14,134 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:35:14,219 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:35:14,221 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:35:14,376 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:35:14,377 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:35:14,482 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:35:14,483 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:35:14,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:35:14 BoogieIcfgContainer [2024-01-27 15:35:14,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:35:14,485 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:35:14,485 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:35:14,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:35:14,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:35:13" (1/3) ... [2024-01-27 15:35:14,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1474d008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:35:14, skipping insertion in model container [2024-01-27 15:35:14,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:13" (2/3) ... [2024-01-27 15:35:14,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1474d008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:35:14, skipping insertion in model container [2024-01-27 15:35:14,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:35:14" (3/3) ... [2024-01-27 15:35:14,490 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2024-01-27 15:35:14,496 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:35:14,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:35:14,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:35:14,504 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:35:14,551 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:35:14,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 66 flow [2024-01-27 15:35:14,617 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2024-01-27 15:35:14,617 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:35:14,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 2/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-01-27 15:35:14,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 66 flow [2024-01-27 15:35:14,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2024-01-27 15:35:14,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:35:14,643 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@75d6433e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:35:14,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:35:14,652 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:35:14,652 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2024-01-27 15:35:14,652 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:35:14,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:14,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:14,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:14,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1773029837, now seen corresponding path program 1 times [2024-01-27 15:35:14,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:14,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266976748] [2024-01-27 15:35:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:14,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:15,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:15,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266976748] [2024-01-27 15:35:15,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266976748] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:15,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:15,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:35:15,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680303986] [2024-01-27 15:35:15,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:15,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:35:15,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:15,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:35:15,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:35:15,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2024-01-27 15:35:15,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:15,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:15,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2024-01-27 15:35:15,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:15,278 INFO L124 PetriNetUnfolderBase]: 69/157 cut-off events. [2024-01-27 15:35:15,288 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-01-27 15:35:15,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 157 events. 69/157 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 645 event pairs, 6 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 227. Up to 79 conditions per place. [2024-01-27 15:35:15,291 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 25 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-01-27 15:35:15,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 144 flow [2024-01-27 15:35:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:35:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:35:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-01-27 15:35:15,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-01-27 15:35:15,303 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 4 states and 65 transitions. [2024-01-27 15:35:15,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 144 flow [2024-01-27 15:35:15,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:35:15,339 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 64 flow [2024-01-27 15:35:15,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-01-27 15:35:15,346 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2024-01-27 15:35:15,349 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 64 flow [2024-01-27 15:35:15,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:15,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:15,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:15,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:35:15,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:15,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1935858214, now seen corresponding path program 1 times [2024-01-27 15:35:15,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:15,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270675826] [2024-01-27 15:35:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:15,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:15,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:15,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270675826] [2024-01-27 15:35:15,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270675826] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:15,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:15,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:35:15,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000198591] [2024-01-27 15:35:15,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:15,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:35:15,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:35:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:35:15,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2024-01-27 15:35:15,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:15,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:15,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2024-01-27 15:35:15,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:15,677 INFO L124 PetriNetUnfolderBase]: 84/178 cut-off events. [2024-01-27 15:35:15,677 INFO L125 PetriNetUnfolderBase]: For 20/29 co-relation queries the response was YES. [2024-01-27 15:35:15,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 178 events. 84/178 cut-off events. For 20/29 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 599 event pairs, 12 based on Foata normal form. 13/188 useless extension candidates. Maximal degree in co-relation 115. Up to 138 conditions per place. [2024-01-27 15:35:15,680 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 22 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-01-27 15:35:15,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 140 flow [2024-01-27 15:35:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:35:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:35:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-01-27 15:35:15,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-01-27 15:35:15,684 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 64 flow. Second operand 4 states and 63 transitions. [2024-01-27 15:35:15,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 140 flow [2024-01-27 15:35:15,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:35:15,689 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 92 flow [2024-01-27 15:35:15,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2024-01-27 15:35:15,690 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2024-01-27 15:35:15,690 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 92 flow [2024-01-27 15:35:15,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:15,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:15,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:15,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:35:15,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:15,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2099421322, now seen corresponding path program 2 times [2024-01-27 15:35:15,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466538677] [2024-01-27 15:35:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:15,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:15,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466538677] [2024-01-27 15:35:15,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466538677] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:15,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:15,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:35:15,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054074244] [2024-01-27 15:35:15,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:15,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:35:15,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:15,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:35:15,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:35:15,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2024-01-27 15:35:15,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:15,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:15,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2024-01-27 15:35:15,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:15,976 INFO L124 PetriNetUnfolderBase]: 90/188 cut-off events. [2024-01-27 15:35:15,976 INFO L125 PetriNetUnfolderBase]: For 88/101 co-relation queries the response was YES. [2024-01-27 15:35:15,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 188 events. 90/188 cut-off events. For 88/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 677 event pairs, 17 based on Foata normal form. 19/203 useless extension candidates. Maximal degree in co-relation 162. Up to 83 conditions per place. [2024-01-27 15:35:15,978 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 30 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2024-01-27 15:35:15,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 211 flow [2024-01-27 15:35:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:35:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:35:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-01-27 15:35:15,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-01-27 15:35:15,979 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 92 flow. Second operand 5 states and 80 transitions. [2024-01-27 15:35:15,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 211 flow [2024-01-27 15:35:15,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:35:15,981 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 131 flow [2024-01-27 15:35:15,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-01-27 15:35:15,981 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2024-01-27 15:35:15,982 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 131 flow [2024-01-27 15:35:15,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:15,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:15,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:35:15,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:15,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1239185092, now seen corresponding path program 3 times [2024-01-27 15:35:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:15,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419282321] [2024-01-27 15:35:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:15,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:16,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:16,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419282321] [2024-01-27 15:35:16,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419282321] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:16,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40695989] [2024-01-27 15:35:16,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:35:16,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:16,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:16,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:35:16,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:35:16,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:16,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:35:16,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:16,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:17,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40695989] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:17,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:17,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-01-27 15:35:17,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033259327] [2024-01-27 15:35:17,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:17,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:35:17,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:35:17,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:35:17,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 26 [2024-01-27 15:35:17,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 131 flow. Second operand has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:17,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:17,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 26 [2024-01-27 15:35:17,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:18,370 INFO L124 PetriNetUnfolderBase]: 519/1012 cut-off events. [2024-01-27 15:35:18,371 INFO L125 PetriNetUnfolderBase]: For 708/733 co-relation queries the response was YES. [2024-01-27 15:35:18,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1012 events. 519/1012 cut-off events. For 708/733 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5424 event pairs, 8 based on Foata normal form. 20/1027 useless extension candidates. Maximal degree in co-relation 1040. Up to 211 conditions per place. [2024-01-27 15:35:18,380 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 104 selfloop transitions, 62 changer transitions 28/200 dead transitions. [2024-01-27 15:35:18,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 200 transitions, 1139 flow [2024-01-27 15:35:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:35:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:35:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 428 transitions. [2024-01-27 15:35:18,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487179487179488 [2024-01-27 15:35:18,385 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 131 flow. Second operand 30 states and 428 transitions. [2024-01-27 15:35:18,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 200 transitions, 1139 flow [2024-01-27 15:35:18,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 200 transitions, 1124 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-27 15:35:18,404 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 661 flow [2024-01-27 15:35:18,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=661, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-01-27 15:35:18,405 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-01-27 15:35:18,405 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 661 flow [2024-01-27 15:35:18,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:18,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:18,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:18,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:18,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:18,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:18,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:18,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1427579381, now seen corresponding path program 4 times [2024-01-27 15:35:18,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:18,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049783588] [2024-01-27 15:35:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:18,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:18,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:18,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049783588] [2024-01-27 15:35:18,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049783588] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:18,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:18,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:35:18,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805782271] [2024-01-27 15:35:18,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:18,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:35:18,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:35:18,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:35:18,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-27 15:35:18,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 661 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:18,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:18,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-27 15:35:18,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:18,985 INFO L124 PetriNetUnfolderBase]: 787/1381 cut-off events. [2024-01-27 15:35:18,986 INFO L125 PetriNetUnfolderBase]: For 6080/6208 co-relation queries the response was YES. [2024-01-27 15:35:18,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5174 conditions, 1381 events. 787/1381 cut-off events. For 6080/6208 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6734 event pairs, 4 based on Foata normal form. 24/1404 useless extension candidates. Maximal degree in co-relation 5129. Up to 367 conditions per place. [2024-01-27 15:35:18,996 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 148 selfloop transitions, 64 changer transitions 0/221 dead transitions. [2024-01-27 15:35:18,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 221 transitions, 1964 flow [2024-01-27 15:35:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:35:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:35:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-01-27 15:35:18,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-01-27 15:35:18,998 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 661 flow. Second operand 9 states and 114 transitions. [2024-01-27 15:35:18,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 221 transitions, 1964 flow [2024-01-27 15:35:19,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 221 transitions, 1737 flow, removed 102 selfloop flow, removed 8 redundant places. [2024-01-27 15:35:19,012 INFO L231 Difference]: Finished difference. Result has 86 places, 134 transitions, 1115 flow [2024-01-27 15:35:19,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1115, PETRI_PLACES=86, PETRI_TRANSITIONS=134} [2024-01-27 15:35:19,013 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-01-27 15:35:19,013 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 134 transitions, 1115 flow [2024-01-27 15:35:19,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:19,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:19,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:19,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:35:19,014 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:19,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash -392968936, now seen corresponding path program 1 times [2024-01-27 15:35:19,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:19,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090496080] [2024-01-27 15:35:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:19,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:19,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:19,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090496080] [2024-01-27 15:35:19,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090496080] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:19,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283456882] [2024-01-27 15:35:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:19,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:19,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:19,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:19,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:35:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:19,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-27 15:35:19,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:21,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:22,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283456882] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:22,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:22,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:35:22,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160400130] [2024-01-27 15:35:22,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:22,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:35:22,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:22,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:35:22,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:35:23,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 26 [2024-01-27 15:35:23,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 134 transitions, 1115 flow. Second operand has 24 states, 24 states have (on average 10.083333333333334) internal successors, (242), 24 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:23,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:23,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 26 [2024-01-27 15:35:23,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:28,150 INFO L124 PetriNetUnfolderBase]: 1650/3215 cut-off events. [2024-01-27 15:35:28,150 INFO L125 PetriNetUnfolderBase]: For 15005/15235 co-relation queries the response was YES. [2024-01-27 15:35:28,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13476 conditions, 3215 events. 1650/3215 cut-off events. For 15005/15235 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21489 event pairs, 26 based on Foata normal form. 155/3354 useless extension candidates. Maximal degree in co-relation 11566. Up to 724 conditions per place. [2024-01-27 15:35:28,172 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 213 selfloop transitions, 179 changer transitions 89/491 dead transitions. [2024-01-27 15:35:28,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 491 transitions, 4654 flow [2024-01-27 15:35:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-01-27 15:35:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-01-27 15:35:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 627 transitions. [2024-01-27 15:35:28,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358974358974359 [2024-01-27 15:35:28,175 INFO L175 Difference]: Start difference. First operand has 86 places, 134 transitions, 1115 flow. Second operand 45 states and 627 transitions. [2024-01-27 15:35:28,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 491 transitions, 4654 flow [2024-01-27 15:35:28,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 491 transitions, 4628 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-01-27 15:35:28,214 INFO L231 Difference]: Finished difference. Result has 150 places, 283 transitions, 3204 flow [2024-01-27 15:35:28,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3204, PETRI_PLACES=150, PETRI_TRANSITIONS=283} [2024-01-27 15:35:28,216 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 122 predicate places. [2024-01-27 15:35:28,216 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 283 transitions, 3204 flow [2024-01-27 15:35:28,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.083333333333334) internal successors, (242), 24 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:28,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:28,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:28,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:28,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:35:28,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:28,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2033025868, now seen corresponding path program 2 times [2024-01-27 15:35:28,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:28,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419814541] [2024-01-27 15:35:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:28,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:29,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:29,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419814541] [2024-01-27 15:35:29,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419814541] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:29,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042133395] [2024-01-27 15:35:29,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:35:29,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:29,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:29,493 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:29,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:35:29,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:35:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:29,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:35:29,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:30,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:32,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042133395] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:32,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:32,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2024-01-27 15:35:32,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135900102] [2024-01-27 15:35:32,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:32,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:35:32,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:32,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:35:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:35:32,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-27 15:35:32,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 283 transitions, 3204 flow. Second operand has 31 states, 31 states have (on average 7.225806451612903) internal successors, (224), 31 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:32,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:32,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-27 15:35:32,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:46,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:36:37,179 WARN L293 SmtUtils]: Spent 40.45s on a formula simplification. DAG size of input: 111 DAG size of output: 38 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:36:43,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:36:47,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:36:51,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:36:59,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:03,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:07,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:11,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:20,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:25,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:30,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:34,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:38,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:42,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:46,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:37:50,245 INFO L124 PetriNetUnfolderBase]: 3831/6552 cut-off events. [2024-01-27 15:37:50,245 INFO L125 PetriNetUnfolderBase]: For 40058/40058 co-relation queries the response was YES. [2024-01-27 15:37:50,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32808 conditions, 6552 events. 3831/6552 cut-off events. For 40058/40058 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 40966 event pairs, 44 based on Foata normal form. 22/6573 useless extension candidates. Maximal degree in co-relation 32688. Up to 1851 conditions per place. [2024-01-27 15:37:50,291 INFO L140 encePairwiseOnDemand]: 13/26 looper letters, 458 selfloop transitions, 401 changer transitions 109/971 dead transitions. [2024-01-27 15:37:50,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 971 transitions, 11049 flow [2024-01-27 15:37:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-01-27 15:37:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2024-01-27 15:37:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1005 transitions. [2024-01-27 15:37:50,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026442307692308 [2024-01-27 15:37:50,296 INFO L175 Difference]: Start difference. First operand has 150 places, 283 transitions, 3204 flow. Second operand 96 states and 1005 transitions. [2024-01-27 15:37:50,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 971 transitions, 11049 flow [2024-01-27 15:37:50,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 971 transitions, 10562 flow, removed 217 selfloop flow, removed 16 redundant places. [2024-01-27 15:37:50,614 INFO L231 Difference]: Finished difference. Result has 276 places, 584 transitions, 7968 flow [2024-01-27 15:37:50,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=7968, PETRI_PLACES=276, PETRI_TRANSITIONS=584} [2024-01-27 15:37:50,615 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 248 predicate places. [2024-01-27 15:37:50,615 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 584 transitions, 7968 flow [2024-01-27 15:37:50,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.225806451612903) internal successors, (224), 31 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:50,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:50,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:50,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:37:50,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:37:50,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:50,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash -10481154, now seen corresponding path program 3 times [2024-01-27 15:37:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:50,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572318871] [2024-01-27 15:37:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:50,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:37:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:37:51,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:37:51,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572318871] [2024-01-27 15:37:51,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572318871] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:37:51,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172790556] [2024-01-27 15:37:51,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:37:51,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:37:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:37:51,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:37:51,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:37:51,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:37:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:37:52,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:37:52,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:06,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:10,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172790556] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:10,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:10,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-01-27 15:38:10,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895956603] [2024-01-27 15:38:10,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:10,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:38:10,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:10,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:38:10,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=701, Unknown=2, NotChecked=0, Total=870 [2024-01-27 15:38:10,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-27 15:38:10,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 584 transitions, 7968 flow. Second operand has 30 states, 30 states have (on average 8.066666666666666) internal successors, (242), 30 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:10,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:10,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-27 15:38:10,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:12,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:38:26,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:38:37,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:38:50,062 WARN L293 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 82 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:39:00,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:39:03,959 INFO L124 PetriNetUnfolderBase]: 4569/8167 cut-off events. [2024-01-27 15:39:03,959 INFO L125 PetriNetUnfolderBase]: For 116881/118285 co-relation queries the response was YES. [2024-01-27 15:39:04,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56708 conditions, 8167 events. 4569/8167 cut-off events. For 116881/118285 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 58082 event pairs, 95 based on Foata normal form. 65/8228 useless extension candidates. Maximal degree in co-relation 56523. Up to 3003 conditions per place. [2024-01-27 15:39:04,040 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 570 selfloop transitions, 414 changer transitions 82/1081 dead transitions. [2024-01-27 15:39:04,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1081 transitions, 16195 flow [2024-01-27 15:39:04,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-27 15:39:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-27 15:39:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 670 transitions. [2024-01-27 15:39:04,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46016483516483514 [2024-01-27 15:39:04,043 INFO L175 Difference]: Start difference. First operand has 276 places, 584 transitions, 7968 flow. Second operand 56 states and 670 transitions. [2024-01-27 15:39:04,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1081 transitions, 16195 flow [2024-01-27 15:39:04,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1081 transitions, 15470 flow, removed 285 selfloop flow, removed 20 redundant places. [2024-01-27 15:39:04,963 INFO L231 Difference]: Finished difference. Result has 330 places, 804 transitions, 12064 flow [2024-01-27 15:39:04,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7435, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=12064, PETRI_PLACES=330, PETRI_TRANSITIONS=804} [2024-01-27 15:39:04,965 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 302 predicate places. [2024-01-27 15:39:04,966 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 804 transitions, 12064 flow [2024-01-27 15:39:04,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.066666666666666) internal successors, (242), 30 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:04,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:04,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:04,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:05,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:05,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:05,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:05,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1750318930, now seen corresponding path program 4 times [2024-01-27 15:39:05,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:05,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853386976] [2024-01-27 15:39:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:05,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:06,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:06,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853386976] [2024-01-27 15:39:06,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853386976] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:06,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029812892] [2024-01-27 15:39:06,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:39:06,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:06,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:06,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:06,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:39:06,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:39:06,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:06,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-27 15:39:06,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:11,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:13,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029812892] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:13,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:13,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-01-27 15:39:13,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552751970] [2024-01-27 15:39:13,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:13,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:39:13,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:39:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=475, Unknown=1, NotChecked=0, Total=600 [2024-01-27 15:39:17,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:39:21,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:39:25,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:39:25,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-27 15:39:25,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 804 transitions, 12064 flow. Second operand has 25 states, 25 states have (on average 7.32) internal successors, (183), 25 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:25,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:25,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-27 15:39:25,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:33,637 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 62 DAG size of output: 45 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:39:41,819 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 57 DAG size of output: 40 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:39:47,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:40:01,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:40:05,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:40:10,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:40:14,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:40:19,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:40:23,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:40:27,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:40:31,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:40:35,790 INFO L124 PetriNetUnfolderBase]: 6586/11113 cut-off events. [2024-01-27 15:40:35,791 INFO L125 PetriNetUnfolderBase]: For 170180/170180 co-relation queries the response was YES. [2024-01-27 15:40:35,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83479 conditions, 11113 events. 6586/11113 cut-off events. For 170180/170180 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 76690 event pairs, 104 based on Foata normal form. 9/11121 useless extension candidates. Maximal degree in co-relation 83295. Up to 4924 conditions per place. [2024-01-27 15:40:35,926 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 680 selfloop transitions, 485 changer transitions 73/1241 dead transitions. [2024-01-27 15:40:35,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1241 transitions, 20449 flow [2024-01-27 15:40:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-27 15:40:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-27 15:40:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 535 transitions. [2024-01-27 15:40:35,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286858974358974 [2024-01-27 15:40:35,937 INFO L175 Difference]: Start difference. First operand has 330 places, 804 transitions, 12064 flow. Second operand 48 states and 535 transitions. [2024-01-27 15:40:35,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1241 transitions, 20449 flow [2024-01-27 15:40:37,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1241 transitions, 19922 flow, removed 224 selfloop flow, removed 16 redundant places. [2024-01-27 15:40:37,611 INFO L231 Difference]: Finished difference. Result has 375 places, 988 transitions, 16377 flow [2024-01-27 15:40:37,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11698, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=16377, PETRI_PLACES=375, PETRI_TRANSITIONS=988} [2024-01-27 15:40:37,612 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 347 predicate places. [2024-01-27 15:40:37,612 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 988 transitions, 16377 flow [2024-01-27 15:40:37,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.32) internal successors, (183), 25 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:37,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:37,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:37,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:40:37,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:37,824 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:37,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash 50408666, now seen corresponding path program 5 times [2024-01-27 15:40:37,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:40:37,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149986624] [2024-01-27 15:40:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:40:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:38,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:40:38,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149986624] [2024-01-27 15:40:38,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149986624] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:40:38,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244027652] [2024-01-27 15:40:38,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:40:38,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:38,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:40:38,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:40:38,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:40:38,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:40:38,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:40:38,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:40:38,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:39,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:40:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:40,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244027652] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:40:40,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:40:40,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 35 [2024-01-27 15:40:40,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462364948] [2024-01-27 15:40:40,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:40:40,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-27 15:40:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:40:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-27 15:40:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2024-01-27 15:40:40,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-27 15:40:40,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 988 transitions, 16377 flow. Second operand has 36 states, 36 states have (on average 6.888888888888889) internal successors, (248), 36 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:40,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:40,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-27 15:40:40,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:41:14,858 WARN L293 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 93 DAG size of output: 87 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:41:21,184 INFO L124 PetriNetUnfolderBase]: 10018/17104 cut-off events. [2024-01-27 15:41:21,185 INFO L125 PetriNetUnfolderBase]: For 319303/319303 co-relation queries the response was YES. [2024-01-27 15:41:21,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138879 conditions, 17104 events. 10018/17104 cut-off events. For 319303/319303 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 127316 event pairs, 80 based on Foata normal form. 22/17125 useless extension candidates. Maximal degree in co-relation 138628. Up to 3451 conditions per place. [2024-01-27 15:41:21,415 INFO L140 encePairwiseOnDemand]: 13/26 looper letters, 1005 selfloop transitions, 1517 changer transitions 162/2687 dead transitions. [2024-01-27 15:41:21,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 2687 transitions, 49455 flow [2024-01-27 15:41:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-01-27 15:41:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2024-01-27 15:41:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 1298 transitions. [2024-01-27 15:41:21,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38402366863905324 [2024-01-27 15:41:21,419 INFO L175 Difference]: Start difference. First operand has 375 places, 988 transitions, 16377 flow. Second operand 130 states and 1298 transitions. [2024-01-27 15:41:21,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 2687 transitions, 49455 flow [2024-01-27 15:41:25,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 2687 transitions, 48770 flow, removed 288 selfloop flow, removed 15 redundant places. [2024-01-27 15:41:25,303 INFO L231 Difference]: Finished difference. Result has 552 places, 2011 transitions, 40126 flow [2024-01-27 15:41:25,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=16071, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=602, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=40126, PETRI_PLACES=552, PETRI_TRANSITIONS=2011} [2024-01-27 15:41:25,304 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 524 predicate places. [2024-01-27 15:41:25,305 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 2011 transitions, 40126 flow [2024-01-27 15:41:25,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.888888888888889) internal successors, (248), 36 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:25,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:41:25,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:41:25,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:41:25,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:41:25,508 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:41:25,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:41:25,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1138883263, now seen corresponding path program 6 times [2024-01-27 15:41:25,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:41:25,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139823623] [2024-01-27 15:41:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:41:25,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:41:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:41:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:41:26,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:41:26,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139823623] [2024-01-27 15:41:26,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139823623] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:41:26,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629740344] [2024-01-27 15:41:26,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:41:26,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:41:26,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:41:26,745 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:41:26,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:41:26,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:41:26,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:41:26,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:41:26,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:41:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:41:27,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:41:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:41:29,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629740344] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:41:29,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:41:29,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-01-27 15:41:29,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285635055] [2024-01-27 15:41:29,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:41:29,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:41:29,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:41:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:41:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:41:29,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-27 15:41:29,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 2011 transitions, 40126 flow. Second operand has 29 states, 29 states have (on average 7.379310344827586) internal successors, (214), 29 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:29,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:41:29,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-27 15:41:29,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:42:22,075 INFO L124 PetriNetUnfolderBase]: 11909/20242 cut-off events. [2024-01-27 15:42:22,076 INFO L125 PetriNetUnfolderBase]: For 612322/612322 co-relation queries the response was YES. [2024-01-27 15:42:22,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197818 conditions, 20242 events. 11909/20242 cut-off events. For 612322/612322 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 153882 event pairs, 86 based on Foata normal form. 14/20255 useless extension candidates. Maximal degree in co-relation 197478. Up to 9322 conditions per place. [2024-01-27 15:42:22,643 INFO L140 encePairwiseOnDemand]: 12/26 looper letters, 1631 selfloop transitions, 1348 changer transitions 91/3073 dead transitions. [2024-01-27 15:42:22,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 3073 transitions, 66633 flow [2024-01-27 15:42:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-01-27 15:42:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2024-01-27 15:42:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 999 transitions. [2024-01-27 15:42:22,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413151364764268 [2024-01-27 15:42:22,646 INFO L175 Difference]: Start difference. First operand has 552 places, 2011 transitions, 40126 flow. Second operand 93 states and 999 transitions. [2024-01-27 15:42:22,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 3073 transitions, 66633 flow [2024-01-27 15:42:36,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 3073 transitions, 61825 flow, removed 2316 selfloop flow, removed 43 redundant places. [2024-01-27 15:42:36,277 INFO L231 Difference]: Finished difference. Result has 632 places, 2490 transitions, 53081 flow [2024-01-27 15:42:36,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=37895, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=920, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=974, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=53081, PETRI_PLACES=632, PETRI_TRANSITIONS=2490} [2024-01-27 15:42:36,280 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 604 predicate places. [2024-01-27 15:42:36,281 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 2490 transitions, 53081 flow [2024-01-27 15:42:36,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.379310344827586) internal successors, (214), 29 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:42:36,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:42:36,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:42:36,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:42:36,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:42:36,495 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:42:36,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:42:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash 965952125, now seen corresponding path program 7 times [2024-01-27 15:42:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:42:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777863117] [2024-01-27 15:42:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:42:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:42:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:42:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:42:37,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:42:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777863117] [2024-01-27 15:42:37,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777863117] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:42:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874572085] [2024-01-27 15:42:37,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:42:37,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:42:37,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:42:37,577 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:42:37,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:42:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:42:37,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:42:37,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:42:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:42:39,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:42:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:42:42,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874572085] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:42:42,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:42:42,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-01-27 15:42:42,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499086680] [2024-01-27 15:42:42,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:42:42,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:42:42,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:42:42,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:42:42,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:42:43,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-27 15:42:43,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 2490 transitions, 53081 flow. Second operand has 31 states, 31 states have (on average 7.32258064516129) internal successors, (227), 31 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:42:43,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:42:43,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-27 15:42:43,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:42:59,085 WARN L293 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 84 DAG size of output: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:43:12,387 WARN L293 SmtUtils]: Spent 12.66s on a formula simplification. DAG size of input: 122 DAG size of output: 77 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:43:13,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:43:26,547 WARN L293 SmtUtils]: Spent 12.72s on a formula simplification. DAG size of input: 84 DAG size of output: 54 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:43:30,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:43:43,835 WARN L293 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 76 DAG size of output: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:44:16,396 INFO L124 PetriNetUnfolderBase]: 15467/26262 cut-off events. [2024-01-27 15:44:16,396 INFO L125 PetriNetUnfolderBase]: For 935111/935111 co-relation queries the response was YES. [2024-01-27 15:44:17,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265475 conditions, 26262 events. 15467/26262 cut-off events. For 935111/935111 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 204274 event pairs, 190 based on Foata normal form. 17/26278 useless extension candidates. Maximal degree in co-relation 265019. Up to 5162 conditions per place. [2024-01-27 15:44:17,475 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 1555 selfloop transitions, 2237 changer transitions 118/3913 dead transitions. [2024-01-27 15:44:17,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 3913 transitions, 90237 flow [2024-01-27 15:44:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-01-27 15:44:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-01-27 15:44:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 943 transitions. [2024-01-27 15:44:17,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-01-27 15:44:17,478 INFO L175 Difference]: Start difference. First operand has 632 places, 2490 transitions, 53081 flow. Second operand 82 states and 943 transitions. [2024-01-27 15:44:17,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 3913 transitions, 90237 flow [2024-01-27 15:44:37,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 686 places, 3913 transitions, 88007 flow, removed 1094 selfloop flow, removed 16 redundant places. [2024-01-27 15:44:37,436 INFO L231 Difference]: Finished difference. Result has 716 places, 3186 transitions, 75931 flow [2024-01-27 15:44:37,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=51753, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1608, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=75931, PETRI_PLACES=716, PETRI_TRANSITIONS=3186} [2024-01-27 15:44:37,439 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 688 predicate places. [2024-01-27 15:44:37,439 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 3186 transitions, 75931 flow [2024-01-27 15:44:37,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.32258064516129) internal successors, (227), 31 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:44:37,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:44:37,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:44:37,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:44:37,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:44:37,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:44:37,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:44:37,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1885761449, now seen corresponding path program 8 times [2024-01-27 15:44:37,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:44:37,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456187516] [2024-01-27 15:44:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:44:37,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:44:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:44:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:44:38,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:44:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456187516] [2024-01-27 15:44:38,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456187516] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:44:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556293525] [2024-01-27 15:44:38,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:44:38,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:44:38,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:44:38,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:44:38,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:44:38,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:44:38,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:44:38,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:44:38,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:44:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:44:44,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:44:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:44:48,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556293525] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:44:48,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:44:48,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-01-27 15:44:48,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129974104] [2024-01-27 15:44:48,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:44:48,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:44:48,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:44:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:44:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=776, Unknown=1, NotChecked=0, Total=930 [2024-01-27 15:44:52,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:44:52,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-27 15:44:52,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 3186 transitions, 75931 flow. Second operand has 31 states, 31 states have (on average 7.258064516129032) internal successors, (225), 31 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:44:52,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:44:52,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-27 15:44:52,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:45:05,460 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 46 DAG size of output: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:45:13,693 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 58 DAG size of output: 40 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:45:21,844 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 69 DAG size of output: 41 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:45:30,090 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 69 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:45:38,247 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 80 DAG size of output: 49 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:46:38,469 INFO L124 PetriNetUnfolderBase]: 18196/30904 cut-off events. [2024-01-27 15:46:38,469 INFO L125 PetriNetUnfolderBase]: For 1159539/1159539 co-relation queries the response was YES. [2024-01-27 15:46:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331554 conditions, 30904 events. 18196/30904 cut-off events. For 1159539/1159539 co-relation queries the response was YES. Maximal size of possible extension queue 1255. Compared 246748 event pairs, 166 based on Foata normal form. 13/30916 useless extension candidates. Maximal degree in co-relation 331073. Up to 12941 conditions per place. [2024-01-27 15:46:39,647 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 2084 selfloop transitions, 2274 changer transitions 108/4469 dead transitions. [2024-01-27 15:46:39,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 4469 transitions, 111791 flow [2024-01-27 15:46:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-01-27 15:46:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-01-27 15:46:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 910 transitions. [2024-01-27 15:46:39,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-01-27 15:46:39,649 INFO L175 Difference]: Start difference. First operand has 716 places, 3186 transitions, 75931 flow. Second operand 82 states and 910 transitions. [2024-01-27 15:46:39,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 4469 transitions, 111791 flow [2024-01-27 15:47:11,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 4469 transitions, 108159 flow, removed 1776 selfloop flow, removed 18 redundant places. [2024-01-27 15:47:12,027 INFO L231 Difference]: Finished difference. Result has 793 places, 3760 transitions, 96358 flow [2024-01-27 15:47:12,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=73547, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1753, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=96358, PETRI_PLACES=793, PETRI_TRANSITIONS=3760} [2024-01-27 15:47:12,030 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 765 predicate places. [2024-01-27 15:47:12,030 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 3760 transitions, 96358 flow [2024-01-27 15:47:12,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.258064516129032) internal successors, (225), 31 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:12,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:12,031 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:12,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:12,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:47:12,243 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:12,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash 740261329, now seen corresponding path program 9 times [2024-01-27 15:47:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481518145] [2024-01-27 15:47:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:12,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:13,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:13,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481518145] [2024-01-27 15:47:13,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481518145] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:13,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509624082] [2024-01-27 15:47:13,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:47:13,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:13,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:13,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:13,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:47:13,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-01-27 15:47:13,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:13,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:47:13,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:14,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:54,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509624082] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:54,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:54,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2024-01-27 15:47:54,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524535234] [2024-01-27 15:47:54,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:54,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-27 15:47:54,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-27 15:47:54,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1132, Unknown=8, NotChecked=0, Total=1332 [2024-01-27 15:47:58,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:48:02,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:48:06,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:48:10,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:48:14,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:48:14,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-27 15:48:14,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 3760 transitions, 96358 flow. Second operand has 37 states, 37 states have (on average 7.162162162162162) internal successors, (265), 37 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:14,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:14,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-27 15:48:14,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:28,783 WARN L293 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 132 DAG size of output: 78 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:48:32,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:48:40,601 WARN L293 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 138 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:48:57,771 WARN L293 SmtUtils]: Spent 16.94s on a formula simplification. DAG size of input: 114 DAG size of output: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:49:09,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:49:13,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:49:18,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:49:21,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Killed by 15